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dc.contributor.authorWang, S. -K.eng
dc.contributor.authorBai, Mengjuneng
dc.contributor.authorHansen, Flemming Y.eng
dc.contributor.authorTaub, Haskelleng
dc.contributor.authorMontfrooij, Woutereng
dc.date.issued2010eng
dc.descriptiondoi: 10.1209/0295-5075/91/66007eng
dc.description.abstractHigh-energy-resolution quasielastic neutron scattering on three complementary spectrometers has been used to investigate molecular diffusive motion in solid nano- to bulk-sized particles of the alkane n-C32H66. The crystalline-to-plastic and plastic-to-fluid phase transition temperatures are observed to decrease as the particle size decreases. In all samples, localized molecular diffusive motion in the plastic phase occurs on two different time scales: a "fast" motion corresponding to uniaxial rotation about the long molecular axis; and a "slow" motion attributed to conformational changes of the molecule. Contrary to the conventional interpretation in bulk alkanes, the fast uniaxial rotation begins in the low- temperature crystalline phase.eng
dc.description.sponsorshipThis work was supported by the U.S. National Science Foundation under Grant No. DMR-0705974 and utilized facilities supported in part by the NSF under agreement No. DMR-0454672. A portion of this research at Oak Ridge National Laboratory's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy.eng
dc.identifier.citationS.-K. Wang et al 2010 EPL 91 66007eng
dc.identifier.issn0295-5075eng
dc.identifier.urihttp://hdl.handle.net/10355/9985eng
dc.languageEnglisheng
dc.publisherInstitute of Physicseng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publicationseng
dc.subjectrotation, vibration, and rotation-vibration constantseng
dc.subjectatomic and molecular physicseng
dc.subject.lcshNeutrons -- Inelastic scatteringeng
dc.subject.lcshCondensed mattereng
dc.titleLocalized diffusive motion on two different time scales in solid alkane nanoparticleseng
dc.typeArticleeng


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